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Flyback Transformers for
Texas Instruments TPS23750

  • Developed for TI TPS23750 PoE PD controller (PMP929 reference design)
  • Isolated, synchronous flyback transformers for IEEE 802.3af PoE applications
  • 18 – 72 V input
  • 10 V, 20 mA bias winding output
  • 1500 Vrms, one minute isolation from the primary and bias windings to the secondary
  • RoHS-compliant  260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations


Part number1
Click to get parts
L at 0 A
±10%2
(µH)
L at Ipk
±10%3
(µH)
DCR max4
(Ohms)
Leakage
L max5
(µH)
Turns ratio6 Ipk3
(A)
Secondary
Output7
Drive
Output
C1173-AL_ 166.5 150.0 0.770 (pri)
0.020 (sec)
0.523 (drive)
1.12 (bias)
2.5 (pri)
0.40 (drive)
pri : sec
pri : drive
pri : bias
6.5 : 1
3.7 : 1
2.0 : 1
 
1.2 3.3 V, 3 A 5.6 V, 10 mA
C1174-AL_ 150.0 135.0 0.515 (pri)
0.023 (sec)
0.570 (drive)
0.88 (bias)
2.0 (pri)
0.40 (drive)
pri : sec
pri : drive
pri : bias
5.0 : 1
3.2 : 1
2.25 : 1
1.2 5.0 V, 2 A 7.5 V, 10 mA
GA3562-BL_ 166.5 150.0 0.740 (pri)
0.100 (sec)
0.456 (drive)
1.15 (bias)
2.05 (pri)
0.245 (drive)
pri : sec
pri : drive
pri : bias
2.0 : 1
4.0 : 1
2.0 : 1
1.2 12.0 V, 0.83 A 6.0 V, 10 mA
1 When ordering, please specify packaging code: e.g. C1174-ALD
  Packaging: D = 13" machine-ready reel
EIA 481 embossed plastic tape (200 parts per full reel).
B = Less than full reel
In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter D instead.
2 Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc
3 Ipk is the peak primary current drawn at minimum input voltage.
4 DCR for secondary is for the windings connected in parallel, measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance for the primary is with the secondary and drive windings shorted; leakage inductance for the drive winding is with the secondary windings shorted.
6 Turns ratio is with the secondary windings connected in parallel.
7 Output for the secondary is with the windings connected in parallel.
8 Ambient temperature range: −40°C to +125°C
9 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
10 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
11 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info

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Updated: April 11, 2017